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MC14093BDG

Quad 2-input NAND Schmitt trigger, 3-18V, 0.9V hysteresis@5V, >50% noise immunity, buffered, SOIC-14

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Manufacturer Part：

MC14093BDG

Package：

SOIC-14 (8.75 x 4.0 x 1.5mm)

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Description

Product Overview

The MC14093BDG is a quad 2-input NAND Schmitt trigger from onsemi with 3V to 18V supply operation. Each gate combines the NAND logic function with Schmitt-trigger input hysteresis, providing noise immunity and the ability to handle slow or noisy input signals. The buffered B-series outputs deliver ±3.4mA at 10V. The SOIC-14 package is rated for -55°C to +125°C, making it suitable for industrial control and automotive applications.

Key Specifications

Logic Function Quad 2-Input NAND Schmitt Trigger (Y = Ā·B̄)
Supply Voltage 3V to 18V
Hysteresis Voltage (VH) 0.9V typ @ 5V; 2.3V typ @ 10V; 3.5V typ @ 15V
Propagation Delay 300ns max @ 5V; 150ns max @ 10V
Output Drive ±1mA @ 5V; ±3.4mA @ 10V; ±6.8mA @ 15V
Quiescent Current 20µA max @ 20V
Input Current 1µA max @ 18V over temperature
Noise Immunity >50% of VDD
Package SOIC-14 (8.75 x 4.0mm)
Operating Temperature -55°C to +125°C

Features

  • Quad 2-input NAND with Schmitt-trigger inputs
  • 3V to 18V wide supply range
  • Input hysteresis for noise immunity
  • No limit on input rise and fall times
  • Greater than 50% noise immunity
  • Buffered B-series outputs
  • Pin-compatible with CD4093B and HEF4093B
  • Direct replacement for MC14093B / CD4093B

Applications

  • Industrial control logic in noisy environments
  • Switch debouncing with NAND gating
  • Monostable and astable multivibrators
  • Wave shaping and pulse conditioning
  • Automotive signal conditioning
  • Level detection with hysteresis

The MC14093BDG from onsemi is a quad 2-input NAND Schmitt trigger, part of the MC14000B CMOS logic family. Each of the four gates combines the 2-input NAND function (Y = Ā·B̄ in negative logic, or Y = A·B in positive AND) with Schmitt-trigger input hysteresis. The hysteresis provides different switching thresholds for rising and falling inputs, preventing oscillation and excessive current consumption with slow or noisy input signals. The wide 3V to 18V supply range suits both 5V logic and industrial 12V/15V systems. The buffered B-series outputs deliver ±3.4mA at 10V with rail-to-rail swing. The device is pin-compatible with the CD4093B from TI and HEF4093B from Nexperia, providing a multi-source solution for Schmitt-trigger NAND gating in noisy environments.

Each of the four NAND Schmitt trigger gates combines a 2-input NAND logic stage with Schmitt-trigger input conditioning. The Schmitt trigger inputs have two thresholds: VP (positive-going) and VN (negative-going), with VP > VN. The hysteresis VH = VP – VN is typically 0.9V at 5V, 2.3V at 10V, and 3.5V at 15V. When both inputs rise above VP, the NAND output goes low. When either input falls below VN, the output returns high. The hysteresis ensures that slowly-changing or noisy input signals do not cause output oscillation. The NAND function combined with Schmitt triggering is particularly useful for gating noisy signals: one input can serve as an enable while the other accepts the signal, with the Schmitt trigger cleaning up both.

Pin Name Description
1 1A Schmitt input A, gate 1
2 1B Schmitt input B, gate 1
3 1Y NAND output, gate 1
4 2Y NAND output, gate 2
5 2A Schmitt input A, gate 2
6 2B Schmitt input B, gate 2
7 VSS Ground
8 3A Schmitt input A, gate 3
9 3B Schmitt input B, gate 3
10 3Y NAND output, gate 3
11 4Y NAND output, gate 4
12 4A Schmitt input A, gate 4
13 4B Schmitt input B, gate 4
14 VDD Positive supply (3V to 18V)
  • Gated Switch Debounce: Debounce a mechanical switch while adding a gate enable. Connect the switch through an RC filter to input A, and the enable signal to input B. When the enable is high, the switch state passes through the NAND gate (inverted) with debounced output. When enable is low, the output is forced high regardless of switch state. The Schmitt hysteresis ensures clean switching from the filtered switch signal.
  • Astable Multivibrator: Create an RC oscillator using one NAND gate by tying both inputs together (making it a Schmitt inverter), adding a feedback resistor from output to input, and a capacitor from input to ground. The oscillation frequency is determined by R, C, and the hysteresis thresholds. The NAND function of the remaining three gates can be used for additional logic in the same circuit.
  • Industrial Limit Switch Conditioning: Condition limit switch signals in a 12V or 15V industrial control system. Each gate accepts a switch signal on one input and a zone enable on the other. The Schmitt hysteresis rejects electrical noise from nearby motor drives, while the NAND gating allows the system controller to selectively enable or disable each limit switch input.
Model VDD Manufacturer Key Difference
CD4093BM96 3-18V TI Pin-compatible, same function
HEF4093BT 3-15V Nexperia Pin-compatible, 15V max
74HC132D 2-6V Nexperia Low-voltage, high-speed
74LVC2G14DCUR 1.65-5.5V TI Dual Schmitt inverter, low voltage
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